Excavating shovel



March 3, 1936. I J, w PAGE 2,032,851

EXCAVATING SHOVEL Filed March 14, 1935 2 Sheets-Sheet 1 March 3, 1936. J. W. PAGE EXCAVATING SHOVEL 2' Sheets-Sheet 2 Filed March 14, 1935 Patented Mar. 3, 1936 UNITED STATES PATENT OFFICE 2,032,851 EXCAVATING sHovEL John W. Page, Chicago, Ill.

Application March 14, 1935, Serial No. 11,151

8 Claims. (Cl. 37-135) This invention relates to improvements in exafter dumping, the shovel is lowered to the cavating shovels or buckets and, more particuground where it rests more or less on its teeth larly, to that type of shovel shown in my Patent with the front end pointing downwardly. As the No. 758,380, dated April 26, 1904; my Patent No. hauling member is tightened, it rolls back into 916,772, dated March 30, 1909; and my Patent position to take its load. I have found that by No. 1,532,775, dated April 7, 1925. raising the pivot point (considering the shovel A shovel of the character referred to is proin its horizontal position). the speed with which vided with a hauling member terminating in a it thus rolls back is lessened. Lowering the pivot bridle, and means are provided for hitching or increases the speed with which the shovel will 10. attaching each end of the bridle to one side of the chop down to its excavating position. 10

shovel. Other features and advantages of my inven- The hauling member being in the form of a tion will appear more fully as I proceed with my cable, rope or the like, is naturally flexible, and specification.

the bridle (usually in the form of chains) which In that form of device embodying the features may be considered a part of the hauling member, of my invention shown in the accompanying 15 is also flexible. drawings- The means for hitching the hauling member Figure l is a view in side elevation; Fig. 2 is a to the side of the-bucket includes a pivotal consimilar fragmentary view on an enlarged scale nection on a horizontal pivot substantially at showing particularly the means for hitching the right angles to the line of pull. The hitching hauling member to the side of the shovel; Fig. 3 20 means back of this pivot is rigid in a vertical is a view-similar to Fig. 2 showing the pivot point plane. That is, the bucket and hauling member adjusted rearwardly, and Fig. 4 is a view similar will have relative angular movement a vertical to Fig. 3, showing the pivot point adjusted rearplane about this pivot. There may be one or wardly and downwardly.

more additional pivots in front of this pivot but Referring to Fig. 1, the shovel I0 is shown up n 25 these will not be effective because tension on the its first engagement with the ground I l as a rehauling member will prevent them from operatsult of the supporting means or lifting cable l2 ing. 'In speaking of the pivot (on a horizontal being lowered. Chains [.3 connect the supportaxis) in the connection between the hauling ing means l2 to the shovel l0 behind the center 9 member and the side of the bucket, it is to be f avity of said shovel, so that when released, understood, therefore, that I refer to the rearthe shovel will swing dow and p its 0011- most pivot; that is, the one back of hi h the tents, as is particularly set forth in Patent No. c n ti n i rigid i rtic l plane, 758,380, granted April 26, 1904, referred to above.

I have found that by moving this pivot point The pivotal connections between the lower ends forwardly or backwardly, operation of the shovel of the chains l3 and the shovel I0 are indicated 35 can be varied. For example, as this pivot point y the reference numeral The front ed of is adjusted forwardly, the longer leverage prothe bottomof the shovel is provided with a cutvided on the bucket causes it to dig less deeply. ting e cutting teeth T e sides of the Moving the pivot rearwardly causes the shovel to S e indicated at p oject slightly forward dig e deeply, of the cutting edge 15 when the shovel I0 is in 40 The principal feature of my invention is the a horizontal p t on.

provision of means for hitching the hauling mem- T hau member 11 is s sa d auli ber to-each side of the shovel, said means includmember terminating in a in ludin bridle ing mechanism by which such -pivot, on each side chains 19. The holding chain is runs over of the bucket, can be readily adjusted forwardly block 20, which block is attached to the support- 45 or backwardly. This construction enablesthe ihg ns The other end of 1ihe holding operator to change the operation of the shovel Chain, after having paseed ever d o is atand adapt it to different conditions and kinds of taehed to The pp p t Of t e arch "i The material, bridle chains l9 are attached to the forward 00 Another feature of my invention is the provipart of the sides l6, by means to be described. "sion of mechanism in the hitch means for verti- The shovel disclosed and claimed herein differs cally adjusting the pivot point. I have found from the shovels shown in the patents above retha't vertical adjustment of this pivot will vary ferred to in the construction, arrangement and the speed with which the shovel will roll back operation of the means by which the hauling into position to take its lead. As is well known, chains 49 are attached to the sides 16. These itself with earth in the ordinary way. Thereupon the shovel, can be raised by a derrick, if desired, and it will be maintained in a horizontal position as long as tension is maintained on the hauling cable I'I. As the shovel is lifted, it is held in horizontal position as long as the hauling cable'II is held taut, the force for holding the shovel horizontal at times passing through the holding chains I8 and at times through the hauling chains I9. As soon as the tension on the hauling cable I! is released, therefore, the means for holding the shovel in a horizontal position is released and its own weightswings it down so as to dump its contents.

It will be noted that when the shovel is dropped to commence its digging cycle, it will assume approximately the position illustrated in Fig. 1. Pulling in the hauling cable I I will then, through the medium of the hauling chains I9, pull the shovelalong and will cause it to fill with earth.

Referring more particularly to Figs. 2, 3 and 4, the side I6 of the shovel is shown provided with a hitch-plate 2I, which plate is here shown attached to. the side by rivets 22. The plate 2| has at its forward edge hinge-members 23, 24 and 25, which hinge-members are adapted to receive a hinge-pin 26. The hinge-pin 26 is so constructed as to be readily removable from the hinge-members. An extension member 21 isso constructed as to embrace the hinge-pin 26 between the hinge-members 23, 24 and 25. The extension member 21 has a head portion 28 at the forward part thereof, which head portion is located off-center vertically with respect to the center of the extension member 21. The head portion is provided with a substantially horizontal opening'29 therethrough, and with an opening 30 substantially vertically therethrough. A clevis 3| is attached to the hauling chain I9, and is provided with a clevis pin 32 adapted to be received by one of the openings 29 or 30 mentioned above.

In the arrangement shown in Fig. 2, the extension member 21 is shown with its head 28 in the upper position, and the clevis 3I is shown with the pin 32 in the vertical opening 30. In this particular arrangement the pivot (on a horizontal axis) in the means connecting the hauling member to the side of the bucket, is located at the point at which the chain I9 engages the clevis 3 I, as indicated by 50, and is in its most upward and forward position with respect to the cutting edge I5. The arrangement here illustrated will result in the bucket taking a comparatively shallow cut in the earth II, and in its being rather slow to drop down off of its teeth and take the digging load when the hauling cable I! is drawn in.

In the arrangement shown in Fig. 3, the extension member 21 is still shown in its upper position. The clevis 3|, however, is here shown with the pin 32 in the horizontal hole 29. This'arrangement will insure a deeper cut by the shovel I0. Since the pivot is still in its upper position with respect to the cutting edge I5, however, the bucket will, still be rather slow to drop off of its cutting edge I and to take the digging load.

32 are both readily removable, any of the arrangements illustrated and described herein may be readily and quickly effected as the type of earth varies, or in accordance with the depth of the cut desired. Although the attachment of the hauling chains I9 to the sides I6 has been described and illustrated as though there were but one chain and one point of connection, it is to be understood that in the commercial shovel there would be a hauling chain connected to each side of the; shovel I0, and that such chains would both connect to the hauling cable I1. in the connecting arrangement between the hauling chain and the side of the bucket would, therefore, have to be duplicated in the arrangement of the connecting means whereby the other chain is attached to the other side of the shovel.

It will be seen that with the pivot point at 5|], as shown in Fig. 2, the means hitching the hauling member I9 to the side of the bucket I6 is rigid in a vertical plane back of this pivot point 50. With the pivot point at 32, as shown in Figs. 3 and 4, the hitching means is rigid in a vertical plane back of such pivot point 32.

The horizontal pivotal axis 50 (as shown in Fig. 2) or the horizontal pivotal axis 32 (as shown in Figs. 3 and 4) may, in each case, be considered as the eifective point of pull. When so considered, the effective point of pull of the hauling member is moved backwardly by the adjustment of Fig. and backwardly and downwardly by the adjustment of Fig. 4. 7

While I have shown and described certain embodiments of my invention, it is to be understood that it is capable of many modifications. Changes, therefore, in the construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the appended claims, in which it is my intention to claim all novelty inhererent in my inven-' tion as broadly as permissible, in view of the prior art. I

What I claim as new, and desire to secure by Letters Patent, is: u 1. In combination with a shovel of the character described, means for hitching a hauling member to the side thereof, said means including a member attached to the side of the shovel and provided with a vertical hole and a horizontal hole, and a clevis attached to the hauling member, said clevis having a pin adapted for insertion into either hole, whereby, when the clevis pin is inserted into the vertical hole the horizontal pivot in the connection between the hauling member and the side of the bucket is moved forwardly.

Any change 2. Apparatus of the character described, includthe clevis pin substantially vertical with respect to said shovel, whereby the effective point of pull of said hauling means may be changed.

3. Apparatus of the character described, including; a shovel having a cutting edge and a forward portion projecting beyond said cutting edge; an extension member attached to said forward portion; hauling means; a. clevis attached to said hauling means; means for pivotally connecting said clevis to said extension member with the axis of. the clevis pin substantially horizontal with respect to said shovel; and means for pivotally connecting said clevis to said extension member with the axis of the clevis pin substantially vertical with respect to said shovel, whereby the effective point of pull of said hauling means may be changed.

4. Apparatus of the character described, including; a shovel having a cutting edge and sides, said sides projecting forward of said cutting edge; supporting means for said shovel, said means being pivoted thereto behind the center of gravity thereof; an extension member mounted on one of said sides; hauling means; a clevis attached to said hauling means; means for pivotally connecting said clevis to said extension member with the axis of the clevis pin substantially horizontal with respect to said shovel; and means for pivotally connecting said clevis to said extension member with the axis of the clevis pin substantially vertical with respect to said shovel, whereby the effective point of pull of said hauling means may be changed.

5. Apparatus of the character described, including; a shovel having a cutting edge and sides, said sides projecting forward of said cutting edge; supporting means for said shovel, said means being pivoted thereto behind the center of gravity thereof; an extension member pivotally mounted on one of said sides, the forward portion of said member having an upper position and a lower position; hauling means; a

clevis attached to said hauling means; means for pivotally connecting said clevis to the forward portion of said extension member with the axis of the clevis pin substantially horizontal with respect to said shovel; and means for pivotally connecting said clevis to said extension member with the axis of the clevis pin substantially vertical with respect to said shovel, whereby the effective point of pull of said hauling means may be changed.

6. Apparatus of the character described, including; a shovel having a cutting edge and sides, said sides projecting forward of said cutting edge; supporting means for said shovel, said means being pivoted thereto behind the center of gravity thereof; an extension member removably mounted on one of said sides, the forward portion of said member having an upper position and a lower position, said forward portion having a substantially vertical opening there- H through and a substantially horizontal opening therethrough; hauling means; a clevis attached to said hauling means; and a clevis pin adapted to be received by one of said openings, whereby said hitching member is connected to said extension member.

7. Apparatus as claimed in claim 6, in which the extension member is mounted on the side on a substantially vertical pivot.

8. In combination with a shovel of the character described; a hauling member; a clevis carried by the hauling member; a pin carried by the clevis; an extension member with its outer end located off center vertically and provided with a horizontal hole and a vertical hole, the pin of the clevis adapted for insertion into either hole; and means for attaching said extension member to the side of the shovel in upright or inverted position.

JOHN W. PAGE. 

